Colin Beattie has resigned as SNP treasurer after his arrest as part of a police investigation into the party's finances.
He said he would also be stepping back from his role on the public audit committee until the police investigation had concluded.
The 71-year-old was taken into custody and released without charge on Tuesday.
It came hours before First Minister Humza Yousaf set out his government's priorities for the next three years.
In a statement, Mr Beattie said he had resigned as treasurer with "immediate effect".
https://www.bbc.co.uk/news/uk-scotland-65327953